Spawning Period and Size at Maturity of the Thornback Ray, Raja clavata (Linnaeus, 1758), (Elasmobranchii: Rajidae) in the Black Sea
[ X ]
Tarih
2020
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
To describe the spawning period, size at maturity ($L_m$), reproductive load ($L_m/L_{max}$), length at maximum yield per recruit ($L_{opt}$) of thornback ray (Raja clavata); and to assess the differences in these parameters from other populations, a total of 18 months samplings were conducted between February 2011 and December 2013 in the southeast Black Sea. A total of 265 (160 females and 105 males) specimens of thornback ray were examined. The mean total length (L) of females was significantly greater than the mean total length of males (p<0.05). The GSI analysis revealed that thornback ray showed reproductive activities throughout the year. The $L_m$ was estimated as 75.44 cm for females and 71.71 cm for males. The Lopt was estimated from the empirical relationships between the $L_{opt} and L_m$, and it was larger than Lm for both sexes.
Açıklama
Anahtar Kelimeler
Biyoloji, Balıkçılık, Deniz ve Tatlı Su Biyolojisi, Zooloji
Kaynak
Acta Aquatica Turcica
WoS Q Değeri
Scopus Q Değeri
Cilt
16
Sayı
4
